When to plant in Lebanon, NH
USDA Zone 5aLebanon, New Hampshire frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 5a, Lebanon gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
LEBANON MUNI AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Lebanon’s own odds, recorded at LEBANON MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 6 | May 22 | May 7 | Sep 12 | Sep 26 | Oct 7 |
| 32°F | May 24 | May 9 | Apr 27 | Sep 23 | Oct 6 | Oct 19 |
| 28°F | May 11 | Apr 29 | Apr 17 | Oct 3 | Oct 15 | Nov 1 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Lebanon, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 9 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Lebanon planting FAQ
When is the last spring frost in Lebanon, NH?
Lebanon's average last spring frost falls near May 9 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Lebanon, NH?
The first fall frost in Lebanon typically arrives around October 6 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Lebanon in?
Lebanon is in USDA hardiness zone 5a. In zone 5a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Lebanon?
Lebanon has about 150 frost-free days — a moderate growing season — between the average last spring frost (May 9) and first fall frost (October 6).
When should I plant tomatoes in Lebanon?
For Lebanon, sow tomatoes indoors about March 14–March 28 and move the seedlings out around May 16, after the last spring frost.
Never miss a window in Lebanon
An email when it’s time to start seeds, transplant, and sow — timed to Lebanon’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Claremont · 28 km
- Rutland · 58 km
- Laconia · 62 km
- Concord · 72 km
- Keene · 76 km
- Manchester · 98 km
- Rochester · 110 km
- Londonderry · 113 km
Frost dates recorded at LEBANON MUNI AP, 4 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Lebanon, NH — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094765. Retrieved from https://blissgarden.com/new-hampshire/lebanon.